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    SubjectRe: [2.6.16 PATCH] Filessytem Events Reporter V2
    Evgeniy Polyakov 写道:
    > On Fri, Apr 07, 2006 at 06:03:04PM +0800, Yi Yang (yang.y.yi@gmail.com) wrote:
    >
    >>>> Can you explain why there is such a big difference between
    >>>> netlink_unicast and netlink_broadcast?
    >>>>
    >>>>
    >>> Netlink broadcast clones skbs, while unicasting requires the whole new
    >>> one.
    >>>
    >>>
    >> No, I also use clone to send skb, so they should have the same overhead.
    >>
    >
    > I missed that.
    > After rereading fsevent_send_to_process() I do not see how original skb
    > is freed though.
    >
    I'm considering how to free it, because cloned skbs share data with
    original skb, so this case is special,
    I try to clarify the logic of kfree_skb.
    >
    >>>>> Btw, you need some rebalancing of the per-cpu queues, probably in
    >>>>> keventd, since CPUs can go offline and your messages will stuck foreve
    >>>>> there.
    >>>>>
    >>>>>
    >>>>>
    >>>> Does keventd not do it? if so, keventd should be modified.
    >>>>
    >>>>
    >>> How does keventd know about your own structures?
    >>> You have an per-cpu object, but your keventd function gets object
    >>>
    >> >from running cpu, not from any other cpus.
    >>
    >
    >

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